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OHMS LAW.pptx

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Maria Antony

This document explains Ohm's law and different types of electric circuits. It discusses current, voltage, resistance, and how changing one factor affects the others. It also covers series and parallel circuits, noting that in series circuits the current is the same through each component and the total voltage equals the battery voltage, while in parallel circuits the current splits equally and the voltage is the same everywhere. Sample circuit problems are provided to illustrate these concepts.

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OHMS LAW Mr. S MARIA ANTONY
- Current: The path an electric current follows - Unit for current is amp - An ammeter measures the amount of current flowing past a certain point
Understanding Ohms Law Ohms law may be easier to understand with an analogy. Current flowing through a wire is like water flowing through a hose.
OHMS LAW.pptx
Increasing voltage with a higher- volt battery increases the current. This is like opening the tap wider so more water flows through the hose.
Increasing resistance reduces the current. This is like stepping on the hose so less water can flow through it.
Increasing the resistance, decreases the flow of current
OHMS LAW.pptx
A series circuit is a circuit in which resistors are arranged in a chain, so the current has only one path to take. The current is the same through each resistor.
You need to be aware of the following rules to work through the next questions. - Current in a series circuit is the same at all parts in a circuit. In a series circuit, the total, or sum of the voltages across all the components will equal the voltage across the cell/battery. - The total voltage supplied by the cell is 12V. There are three lamps connected in series, so 12/3 = 4V.
- The parallel circuit splits into each routes; - Example: - This means the current also splits into 3 equal amounts. Therefore, 9/3 = 3Amps - The voltage will be the same everywhere
Questions: The label on the battery says 6V. If we connected a voltmeter across each lamp, what would the readings be? At lamp 1 - ________V At lamp 2- ________V At lamp 3- ________V
Questions What type of circuit is this? What voltage will load 1, 2 and 3 have ? What current will Load 1, 2 and 3 have? 9 V L1 L2 L3

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OHMS LAW.pptx

  • 1. OHMS LAW Mr. S MARIA ANTONY
  • 2. - Current: The path an electric current follows - Unit for current is amp - An ammeter measures the amount of current flowing past a certain point
  • 3. Understanding Ohms Law Ohms law may be easier to understand with an analogy. Current flowing through a wire is like water flowing through a hose.
  • 5. Increasing voltage with a higher- volt battery increases the current. This is like opening the tap wider so more water flows through the hose.
  • 6. Increasing resistance reduces the current. This is like stepping on the hose so less water can flow through it.
  • 7. Increasing the resistance, decreases the flow of current
  • 9. A series circuit is a circuit in which resistors are arranged in a chain, so the current has only one path to take. The current is the same through each resistor.
  • 10. You need to be aware of the following rules to work through the next questions. - Current in a series circuit is the same at all parts in a circuit. In a series circuit, the total, or sum of the voltages across all the components will equal the voltage across the cell/battery. - The total voltage supplied by the cell is 12V. There are three lamps connected in series, so 12/3 = 4V.
  • 11. - The parallel circuit splits into each routes; - Example: - This means the current also splits into 3 equal amounts. Therefore, 9/3 = 3Amps - The voltage will be the same everywhere
  • 12. Questions: The label on the battery says 6V. If we connected a voltmeter across each lamp, what would the readings be? At lamp 1 - ________V At lamp 2- ________V At lamp 3- ________V
  • 13. Questions What type of circuit is this? What voltage will load 1, 2 and 3 have ? What current will Load 1, 2 and 3 have? 9 V L1 L2 L3